<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			div{
				width: 200px;
				height: 200px;
				border-width: 10px;
				border-color: pink;
				/* border-style: solid; */
				/* border-style: dashed; */
				/* border-style: dotted; */
				border-style: double;
			}
		</style>
	</head>
	<body>
		<div>我是一个盒子</div>
	</body>
</html>
